3D acceleration not working on OSE

3D acceleration does not appear to be working on OSE. The checkbox is present, but marking it won't result in VBox.log including the usual information about OpenGL (e.g. "OpenGL Info: Render SPU: GL_VENDOR: blah").

I suspect it has something to do with incomplete handling of the OpenGLEnabled configuration setting. It is checked for, but there seems to be no code to enable it: